The fix for RT-20978 to not use CALayers for ordinary (non-embedded) windows has introduced a serious regression. As reported by Chien, the failure modes are:

1) Exiting any program, including HelloRectangle, will cause the following assert to throw:

2012-06-10 12:48:48.845 java[35395:407] *** Assertion failure in -[GlassView3D lockFocus], /SourceCache/AppKit/AppKit-1138.32/AppKit.subproj/NSView.m:6116
2012-06-10 12:48:48.845 java[35395:407] lockFocus caught exception: -[GlassView3D(0x7fcce323a460) lockFocus] failed with window=0x0, windowNumber=0, [self isHiddenOrHasHiddenAncestor]=0
2012-06-10 12:48:48.846 java[35395:407] unlockFocus caught exception: Unlocking Focus on wrong view (<GlassView3D: 0x7fcce323a460>), expected <_NSThemeCloseWidget: 0x7fcce1c3af30>

2) Tooltip and related second Stage rendering is broken. Run HelloTooltip and HelloComboBox to see the black border on second stage.